Rugged plastic.Dent resistant,corrosive resistant: Rust proof and leadk proof.Tank holds capacity up to 18 Gal.Telescopic drain bowl adjustable from 59" to 68.5.Four swivel casters for easy maneuver. Thank capacity:19Gal Max.oil capacity:18Gal Min.overall height:59" Max.overall height:68.5" Net weight:16.5lBs